defocus button after clicking it

In a VB project I have 3 buttons (checkbox with buttons appearance). If I click 1 of them it remains selected (focused).

I will control that program with a small RF keyboard, I suffer of pressing the space key very easy!

How can I deselect (loose the focus) of that control to avoid the accidental activation-deactivation by space pressing? I've tried adding a hidden button, and focusing it on the click event of the check-buttons"... like:

newbutton.focus()

but it doesn't work! Later I've tried to focus the mainform but also it doesn't work!

form1.focus()

also I've tried:

Form1.select()

but still no working after clicking(checking) the button it can be easily unchecked clicking the space key again! Which is the correct way to avoid the accidental unchecking?

thanks.

Solution

It appears that you working with a WinForm. The Form as a property named ActiveControl that can be set to Nothing (null). Doing so in the CheckBox.CheckedChanged handler, will unfocus the CheckBox and prevent the issue you are experiencing.

Private Sub CheckBox1_CheckedChanged(sender As Object, e As EventArgs) Handles CheckBox1.CheckedChanged
    Me.ActiveControl = Nothing
    ' any other necessary code
End Sub